A pair of Chinese produced PCBs and heatsinks to make a clone or similar replica of the original Quad 405 current dumping amplifier. The heatsinks are T shaped as in the original design. There are also a number of components provided including MJ15003 power transistors (cant tell if they are genuine...) and other transistors, resistors, ICs, pads, fuses, capacitors and Dada provided inductors. See photographs. There is probably about 90% of the components needed to complete a pair these amplifiers but I CANNOT guarantee this. If you peruse on line youll find which of the transistors in the provided packs are substitutes for the originals. I would suggest these are suitable only for a competent hobbyist or electrical engineer. I am clearing out a number of parts I accumulated for making my own Quad 405/606 and NAP amplifiers plus a few other items. The PCBs were brought back from China but the heatsinks and most components have been bought in the UK. Being Chinese clones of the original designs, please be aware there may be errors or substitute components. I have no reason to suspect there are any issues with these products but please be aware that some checking may be needed. The creator LJM of some of the Quad boards has been around for some time and is active on a number of hobbyist audio sites and so I believe his stuff to be reliable. Note - these boards have the Zobel network connected to signal ground as in the original Quad design. This means there has to be two separate earth connections to the boards as per the original Quad 405 design (one connection via input sockets, one via heatsink mounting point). The boards will work perfectly fine in this configuration. It is recommended however to make a small correction to the boards to allow only a single earth connection to be made. See the attached note and photograph for details. The starting price reflects the number of items provided......

Pair ESL 63. Both speakers working, and sound excellent. One with no issues at all. The other one has a very occasional ‘popping’ noise from the lower bass panel. It is completely silent for days at a time, then shows up for maybe half an hour, then clears again. Socks in good condition with one small hole on the rear of one. Wood caps in unmarked condition. Complete with original boxes / polystyrene inserts. Collection from DL14. East Yorkshire. But if you want to arrange your own courier service I’ll box them up and seal the cartons. No returns.

One pair of Quad ESL 63 Speaker Stands - Quadrapod Solid construction. Good condition with scuffs and scratches, and some of the paintwork is flaking off on the rear of one stand stands will be well packed. Getting rare these days.

QUAD 303 SPARE PCB SET (TWO AMP DRIVERS AND ONE PSU REGULATOR) You are bidding on two amp driver PCBs and one PSU regulator PCB for a Quad 303 amplifier.New Piher trimmers and Panasonic electrolytic capacitors fitted to both the amp driver PCBs.One amp board works perfectly, the other is unable to set the 33.5v mid point but driver TRs OK.The PSU regulator PCB has a new Piher trimmer fitted and maintains a steady 67V after warmup.Providing original replacement PCBs and spare components for your ailing Quad 303 amplifier.